Ability to group/combine icons of different programs

I really dislike windows' default grouping policy of icons in the taskbar, I actually got to know this amazing program when trying to find a way to disable this feature.

I now believe it could be useful if it allowed me to group/combine icons of different programs (e.g., a mail, a spreadsheet, a browser window).

Would this be possible to achieve with 7TT?

Thanks again for your great work, keep it up!

Cheers,